Patient dose optimization in plain radiography based on standard exposure factors

George J; Eatough J P; Mountford P J; Koller C J; Oxtoby J; Frain G
October 2004
British Journal of Radiology;Oct2004, Vol. 77 Issue 922, p858
Academic Journal
A computational technique for assessing patient dose in plain radiography is described allowing a large number of examinations to be assessed and enabling dose optimization to be promoted. Entrance surface dose (ESD) was calculated for more than 1500 standard exposure settings in an initial dose assessment. Validation of the technique showed good agreement with thermoluminescent dosimetry and showed broad agreement between the standard exposures and the exposure settings used in practice. The dose assessment was repeated 18 months later using the same techniques for almost 2000 standard exposure settings. In both cases, calculated doses showed good compliance with national diagnostic reference levels where available. Suggested investigation levels were established and set at twice the mean dose for each of 47 examinations. Radiology departments were encouraged to review and optimize doses exceeding these levels. The computed mean ESD in the review study was less than the corresponding value in the initial study in 37 of the 47 examinations. The dose reduction was attributable partly to equipment replacement, but primarily to optimization of exposure settings. The technique employed here provides a valid and cost effective method of complying with statutory requirements for the assessment of representative patient dose and is useful in assisting the ongoing process of dose optimization.


Related Articles

  • PROTOCOLS FOR DOSIMETRY AND PATIENT REFERENCE LEVELS. Faulkner, K. // Radiation Protection Dosimetry;2005, Vol. 117 Issue 1-3, p195 

    Doses in radiology should be as low as reasonably achievable. In order to compare practice in different centres it is necessary to compare patient doses. This can only be undertaken if dosimetry studies are similar. In order to facilitate comparisons, the DIMOND consortium developed a patient...

  • Mammography dosimetry using an in-house developed polymethyl methacrylate phantom. Sharma, Reena; Sharma, Sunil Dutt; Mayya, Y. S.; Chourasiya, G. // Radiation Protection Dosimetry;Aug2012, Vol. 151 Issue 2, p379 

    Phantom-based measurements in mammography are well-established for quality assurance (QA) and quality control (QC) procedures involving equipment performance and comparisons of X-ray machines. Polymethyl methacrylate (PMMA) is among the best suitable materials for simulation of the breast. For...

  • PORTABLE TL DOSEMETER–ESD PHANTOM COMBINATION FOR CHEST AND LUMBAR SPINE RADIOGRAPHY. Niittymãki, Henri; Hakanen, Arvi; Rautio, Simo; Järvinen, Hannu // Radiation Protection Dosimetry;2008, Vol. 130 Issue 2, p224 

    A thermoluminescence dosemeter (TLD)—entrance surface dose (ESD) phantom combination was calibrated in terms of air-kerma in IEC RQR X-ray radiation qualities between 50 and 150 kV. The ESD phantom was designed and constructed as a part of the work. With the combination, air-kermas were...

  • PATIENT DOSE ESTIMATION FOR MULTI-DETECTOR-ROW CT EXAMINATIONS. Nishizawa, Kanae; Mori, Shin-Ichiro; Ohno, Mari; Yanagawa, Noriyuki; Yoshida, Takashi; Akahane, Keiichi; Iwai, Kazuo; Wada, Shin-Ichi // Radiation Protection Dosimetry;Jan2008, Vol. 128 Issue 1, p98 

    The spread of Multi-detector-row computed tomography (MDCT) has been remarkable. Here, various organ and tissue doses were evaluated with six types of MDCT scanners in common use in Japan; using thermoluminescence dosimeters and anthropomorphic phantoms under condition of routine clinical...

  • IDENTIFICATION OF STATIC EXPOSURE OF STANDARD DOSIMETRIC BADGE WITH THERMOLUMINESCENT DETECTORS. Budzanowski, M.; Olko, P.; Kopeć, R.; Obryk, B.; Dzikiewicz-Sapiecha, H.; Siwicki, R. // Radiation Protection Dosimetry;2007 Special Issue, Vol. 125 Issue 1-4, p213 

    There are three main methods used in individual monitoring: radiographic films, thermoluminescence (TL) and optically stimulated luminescence (OSL). Distinguishing between static (e.g. by leaving it accidentally or purposely in the radiation field) and dynamic exposures can be almost routinely...

  • A manufacturer's role in reducing the dose of cone beam computed tomography examinations: effect of beam filtration.  // Dentomaxillofacial Radiology;Feb2011, Vol. 40 Issue 2, p115 

    No abstract available.

  • DOSIMETRY METHODS FOR MULTI-DETECTOR COMPUTED TOMOGRAPHY. Gancheva, M.; Dyakov, I.; Vassileva, J.; Avramova-Cholakova, S.; Taseva, D. // Radiation Protection Dosimetry;2015 Special Issue, Vol. 165, p190 

    The aim of this study is to compare four dosimetry methods for wide-beam multi-detector computed tomography (MDCT) in terms of computed tomography dose index free in air (CTDIfree-in-air) and CTDI measured in phantom (CTDIphantom). The study was performed with Aquilion One 320-detector row CT...

  • Radiation exposure of the operator during cardiac catheter ablation procedures. Pantos, I.; Koukorava, C.; Nirgianaki, E.; Carinou, E.; Tzanalaridou, E.; Efstathopoulos, E. P.; Katritsis, D. G. // Radiation Protection Dosimetry;Jul2012, Vol. 150 Issue 4, p306 

    Radiation exposure of the operator during cardiac catheter ablation procedures was assessed for an experienced cardiologist adopting various measures of radiation protection and utilised electroanatomic navigation. Chip thermoluminescent dosemeters were placed at the eyes, chest, wrists and legs...

  • The use of enriched 6Li and 7Li Lif:Mg,Cu,P glass-rod thermoluminescent dosemeters for linear accelerator out-of-field radiation dose measurements. Takam, R.; Bezak, E.; Liu, G.; Marcu, L. // Radiation Protection Dosimetry;Jun2012, Vol. 150 Issue 1, p22 

    6LiF:Mg,Cu,P and 7LiF:Mg,Cu,P glass-rod thermoluminescent dosemeters (TLDs) were used for measurements of out-of-field photon and neutron doses produced by Varian iX linear accelerator. Both TLDs were calibrated using 18-MV X-ray beam to investigate their dose–response sensitivity and...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics